M. M. Sadawy, Saad. M. Fayed, Hani E. Sharafedin, A. I. Salem, Ahmed Hosny, Shengli Li
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Hydrated Nano-Blast Furnace Slag: A Green and Efficient Adsorbent for Industrial Wastewater Treatment
This study investigated the efficiency of hydrated nanoscale blast furnace slag (NBFS) as a cost-effective and sustainable adsorbent for removing iron, copper, and zinc ions from wastewater. The NBFS was modified through a dual process involving nanoscale transformation and hydration with water (20 wt.%) for 7 days, enhancing its surface area and reactivity. The hydrated NBFS was characterized using XRF, SEM, EDS, FTIR, and XRD techniques, revealing its amorphous to crystalline transformation and the presence of OH− as a functional group. Batch adsorption experiments were conducted to optimize the parameters of adsorbent dosage, pH, contact time, initial ion concentration, and temperature. The results demonstrated remarkable removal efficiencies of 99.4% for Fe, 96.2% for Cu, and 93.7% for Zn at an optimal pH of 6, a contact time of 90 min, and a temperature of 70 °C. The adsorption process followed pseudo-second-order kinetics and the Langmuir isotherm model, indicating a chemisorption mechanism with monolayer coverage. Thermodynamic studies confirmed that the adsorption process was spontaneous. Additionally, the hydrated NBFS exhibited excellent reusability, maintaining a high removal efficiency over five consecutive adsorption-desorption cycles.
期刊介绍：
JOM is a technical journal devoted to exploring the many aspects of materials science and engineering. JOM reports scholarly work that explores the state-of-the-art processing, fabrication, design, and application of metals, ceramics, plastics, composites, and other materials. In pursuing this goal, JOM strives to balance the interests of the laboratory and the marketplace by reporting academic, industrial, and government-sponsored work from around the world.
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